package com.github.lamda;

/**
 * Description:
 *
 * @author zwl
 * @version 1.0
 * @date 2021/8/23 下午3:59
 */
@FunctionalInterface
public interface FunctionDemo {

    int swap(int a,int b);

    default void test(){
        System.out.println("wqwq");
    }
}
